Built in 1893, she was an innovative ironclad ram designed for inner harbour defence. Armament was four 6pdrs but the maim weapon was the ram. Rendered rapidly obsolete she was decommissioned and sunk as a target vessel in 1909.
|pic from http://en.wikipedia.org/wiki/USS_Katahdin_(1893)|
Built in 1893 this was a schooner rigged gunboat. Her main armament was eight 4 inch guns, backed up by four 6 pdrs and four 1 pdrs. She had three separate commissions and ranged far and wide before being sold to the Mexican Navy in 1920.
|pic from http://en.wikipedia.org/wiki/USS_Machias_(PG-5)|
|Pic from http://en.wikipedia.org/wiki/USS_Dahlgren_(TB-9)|